@article{MAN_1979__241_163260,
     author = {Bent Fuglede},
     title = {Harnack {Sets} and {Openness} of {Harmonie} {Morphisms.}},
     journal = {Mathematische Annalen},
     pages = {181--186},
     publisher = {mathdoc},
     volume = {241},
     year = {1979},
     zbl = {0401.31004},
     url = {http://geodesic.mathdoc.fr/item/MAN_1979__241_163260/}
}